Improvement in steam-engines



L. CARMAN.

Improvement in Steam- Engines.

No. 122,224. Paented Dec. 2e,s7..

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UNITED STATES PATENT OFFCE'.

LEANDER CARMAN, OF MCCOY S STATION, OHIO.

IMPR OVEMENT IN STEAM-ENGINES.

Specification forming part of Letters 'Patent No. 122,224, dated December 26, 187 1.

To all whom it may concew:

Be it known that I, LEANDER GARMAN, of Mc- Goy s Station, in the county of J efi'erson and State of Ohio, have invented a new and val nable Improvement in Stean-Engines; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation i of the same, reference being had to the annexed drawing making a part of this specificaton, and

'to the letters and figures of reference marked ,which is open at both ends and divided into two similar amrtments, B', by means of a center partition, G, on either side of which are the steanpassages d opening into the valve-box D. Between the passages d is a wall, d in which is made an eXhaust-opening or passage, d G' indicates the pistons working within the chambers or apartments B'. E are the piston-rods, secured to the cross-heads F of a reciprocating frame, G, which is arranged to slide along the top of the bed A, and is connected,by means of a pitman, h, to the crank h on the sha-ft of the fly-wheel h The pistons are so arranged that one approaches the partition G while the other recedes from it,

one of the apartments B exhausting while the exhaust steam to pass through from the cylinder a to the eXhaust-passage d Steam passing through the valve-box is let into the apartnents B alternately, according as the changing position of the valve opens the communication and closes the eXhaust.

The drawing shows the piston 011 the left as at the outer end of the cylinder and the valve in position to exhaust the chamber through which said piston plays, and to move to the left and adnit steam to the other chamber, so as to move the other piston to the right.

The cylinder'constructed a's herein described prevents steam cushioning to a great extent, and enables the en gineer to keep the packing in order more easily than in an ordinary engine.

What I claim as my invention, and desire to secure by Letters Patent, is

, In' a stea n-engine having the open-end cylin der B separated into two compartnents, B' B', by the partition G, the arrangement of the steampassages d d, the intervening wall d perforated for the exhaust d and the D-valve H, all constructed and arranged to operate as specified.

In testimony that I claim the above, I have hereunto subscribed my name in the presence of two witnesses.

LEANDER CARMAN.

witnesses B. L. MYERS,

J. F. BALL. V 150 

